Knitting-machine-needle-knocking-over means



E. E. PRESTON.

KNITTING MACHINE NEEDLE KNOCKING OVER MEANS.

APPLICATION FILED FEB. 25, I920.

1,436,529, Patented Nov. 21, 1922.

Patented Nov. 21, 1922.

. UNITED STATES EDWARD EVERARD PRESTON, OF LEICESTER, ENGLAND.

kNITTING-MACHINE-NEEDLE-KNOCKING-OVER MEANS.

Application filed February 25, 1920. Serial No. 361,187.

To all whom it may concern:

Be it known that I, EDWARD EVERARD PRESTON, a subject of the King of Great Britain, residing at 28 Melrose Street, Leicester, England, have invented a new and useful Knitting Machine Needle -Knocking-Over Means, of which the following is a specification.

My invention relates to improvements in knitting machine needle knocking over means and concerns more particularly though not exclusively, warp knitting machines and more particularly to an improvement in my former application for patent Ser. No. 336,961, now abandoned, and British Patent 134,360, accepted November 6, 1919.

The improvements comprising my invention are primarily intended for application to bearded needle machines and mainly double-rib or double-needle-bed machines, although the invention is not limited in either of these respects as it may be applied tolatch needle machines and to machines of either the single bed or the double bed t pe.

My invention comprises in a paralle or straight bar knitting machine having the knocking over bar arranged on the front of the needles, means situated at the back of the needles to prevent displacement of the needles from between the knocking over blades and--when necessary-support the said needles against the action of the presser.

Conveniently the said means consist of a rod or wire passed through the knockingover blades and situated at the back of the needles. An important advantage arising out of the employment of the improved knocking-over bits in a double-needle-bed machine is that the needles of one bed can be arranged to approach very near to those of the other bed as will be hereinafter explained, thus rendering possible the production of finer fabrics.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a transverse sectional View of part of a double-rib warp machine furnished with the improved knocking-over bits according to this invention; Fig. 2 is'a perspective view and Fig. 3 is a plan of one of the knocking-over bit leads or sections; Fig. 4 drawn to a smaller scale than the previous knocking-over bars; Fig. 5 is a fragmentary plan view taken on Fig. 4.

Similar figures refer to similar parts throughout the several views.-

Separate plates or blades 1 to constitute the knocking-over bits are mounted with spaces between them (Fig. 3) in leads 2 preferably cast in sections and of a form suitable to enable them to be attached sideby-side to a knocking-over bar 3. Conveniently, the lead sections have formed on the underside a shoulder 4 to make contact with the edge 5 of the bar 3 for the purpose of alignin the blades of one section with those of t e next, and each section has a hole 6 for the passage of a screw 7 by which the section is attached to the bar. Instead of attaching the lead sections to the bar 3 by screws, clamp devices or other means may between the blades or bits 1.

According to my invention a Wire or rod '14 is passed through holes in the knockingover blades 1, said wire or rod being situated just behind the needles and forming a transverse bridge from one blade to another (as shown in F ig. 3) to keep the needles from being deflected or being pressed out of the space between theblades and also to constitute a support against which the needle may rest (as shown in Fig. l) duringthe time its beard is being pressed upon by the presser-bar 13. The said wire or rod 14 is situated as near the extremity of the blades 1 as possibleand may be passed through the whole of the blades or bits of each section, or through the whole of the blades in the knocking-over bar. The wire or rod, or each sectional length of same, maybe fastened in position by solder or in any other suitable manner.

By this improvement in the knocking-over means, in a double-rib warp machine or other parallel machine, the needles (as for example the needles 8, 9 in Fig. 1) of the opposite bars may be arranged closer together than heretofore seeing that-not only are the knocking-over bars situated on the front of the needles and therefore do not occupy any space between the needles, but the latter may be located very near the extremities of the blades 1, the space 12 between the ends of the blades being just sufficient to allow the knitted fabric to pass down.

This is an im ortant feature of improve-- ment in a. doub e-bud machine as obviously by bringing the needles of the opposite beds into closer proximity a finer fabric can be produced and it is the revision of the wire or rod behind the need es which enables the latter to work at the extremities of the closely situated knocking-overblades of the opposite bars without being displaced from between the blades.

Further advantages obtained by the hereindescribed means for supportin the needles between the knocking-over bla es, are that a much lighter press is required, and backward bending of the needle during pressing is prevented, conseijluently the loops are landed more easily, t e presser can be made effective by a shorter movement and therefore an increase in speed may be obtained, and shorter beards may be used. These advantages are obtained both in the double-bed machine and in the single bar by means of my invention.

Obviously in a latch needle machine, the Wire or rod 14 ,passed through the knockingover bits as aforesaid may serve to keep the needles in position between the blades.

In the concrete embodiment of the invention illustrated in the drawings, the knocking-over bars 8, 3 of the knocking-over bit sections 2 are of angle section, each bar being supported by a lug 15 (F ig- 4) situated one at each end of the bar and fastened thereto by screws 16. The said lugs are pivotally altta'ched eacih to brackets 17 held in position on a second bracket 18 by a screw 19, the bracket 18 being fastened to the side of the machine frame 20 by a screw 21. A distance piece 22 is secured to the opposite brackets 18 by screws 23 to complete the rigid structure between the oppositesides of the machine frame 20. A- set screw 24 in the bracket 17 bears against one side of the angle bar 3 to support same at the desiredangle, the bracket 17 being adjustable along the bracket 18 in the apertures 18' to provide for adjustment of the space between the knocking-over bits of the opposite bars, while the bracket 18 is adjustable up or down the frame 20 in the apertures 20' so that the height of the knocking-over bits may be altered as required. By the set screw 24 and adjustable brackets 17 and 18, the angle, height and distance between the knocking-over bits of the opposite bars 3, 3 may be altered, the one bar being adjustable independent of the other. By transverse slots 15 in the lugs 15 for the passage of the screws 16, longitudinal adjustment the knock-over bar behin said needles to prevent displacement of the needles from between the knocking-over bar blades, and

for supporting said needles against the action of the presser ofthe machine, said knocking-over bar being pivotally mounted and transversely adjustable with relation to the frame of the machine.

2. In a double rib machine, the combination of knocking-over bars, needles arranged behind said bars, said needles work ing between the separate blades of the bars, a rod assed through the blades and located behind the needles to prevent displacement of said needles and supporting said needles to receive the action of the presser of the machine, said knocking-over bar being pivotally mounted and transversely adjustable with relation to the frame of the machine.

3. In parallel or straight bar knitting machines, such as described, the combination of a plurality of needles, a bracket slidably mounted on the frame of the machine, a knocking-over bar pivotally mounted on the bracket, blades extending from said bar, between which the needles'work, a rod passed through said blades and situated ust behind the needles, leads carried by said blades and attached side by side to the knocking-over bar in advance of the needles, and adjusting means for positioning -the bar to move in horizontal and vertical planes.

4. In a machine of the type described, the combination of a plurality of needles, guides including separate blades between which said needles work, a rod passed throu h said guides, and situated immediately behind the needles, leads arranged in sections and supportin the blades, shoulders upon said eads or bearing against the knocking-over bar of the blades to facilitate alignment, connecting members from said leads to the knocking-over bar, said, knocking-over bar carried from lugs pivotally mounted upon brackets connected to the machine, set screws carried b against the knocking-over bar, and hold the same at an adjustable angle, said brackets being slidably mounted upon the machine and distance members connected opposite the brackets when more than one set of guides is employed.

EDWARD EVERARD PRESTO-N. Witnessesz.

ELLIs Po'rrnn, F RANK BRADSHAW.

said brackets to bear. 

